Dulmar guud ee lasers-ka

Dulmar guud eelased lasers

Habka ugu toosan ee loo soo saarolaserPulses waa in lagu daro atulator-ka dibedda ee laser joogtada ah. Qaabkani wuxuu soo saari karaa garaaca garaaca ee ugu dhakhsaha badan, in kastoo sahlan tahay, laakiin qashinka khafiifka ah iyo awoodda ugu sarreysa kama badnaan karo awood fudud. Sidaa darteed, hab wax ku ool ah oo lagu abuuro laser-ka laser-ka waa in lagu meeleeyo godka laser-ka, ku keydiso tamarta waqtiga ka baxsan wadnaha garaaca wadnaha iyo siidaynta waqtiga. Afarta farsamooyin caan ah ee loo adeegsado in lagu abuuro pulses iyada oo loo marayo in wax laga beddelo laser-ka laser-ka waa beddelaadda, wareejinta Q-beddelka (Beddelka Guuldarada), Xundanta Dareenka, iyo Qulqulka Qaabka.

Guuldaduhu waxay abuurtaa lugo gaagaaban iyagoo wax ka beddelaya awoodda matoorka. Tusaale ahaan, Semiconductor Heals-Put-Bedel ayaa ka soo saari kara miraha in yar oo nanoosconds ah ilaa boqol picoseconds by hadda. In kasta oo tamarta garaaca wadnaha ay hooseyso, habkani waa mid dabacsan, sida bixinta soo noqnoqoshada ku celcelinta la isku hagaajin karo iyo ballac garaaca wadnaha. Sanadka 2018, cilmi baadhayaashii Jaamacadda Tokyo ayaa sheegay in Femtosececond Premiconductor Semiconductor Semiconductor laser, oo matalaya wax ka dhimashada dhalooyinka farsamada ee 40 sano ah.

Puls Nanosecond Pulses waxaa guud ahaan laga keenay lasers-bur ah, kaas oo lagu soo rogay dhowr safar oo wareeg ah oo ku yaal godka, iyo tamarta garaaca wadnaha waxay ku jirtaa baaxadda dhowr millijo ah, iyadoo kuxiran cabirka nidaamka. Tamarta dhexdhexaadka ah (guud ahaan hoosta 1 μj) picosecond iyo pimtosecond puls-ka waxaa badanaa lagu dhajiyaa qaab-qufulan oo qufulan. Waxaa jira hal ama in kabadan oo ka mid ah zulses-ka laser-ka laser ee baaskiil si joogto ah. Jidwalba sawir-qaad kasta ayaa ku wareejinaya garaaca garaaca iyada oo loo marayo muraayadda wax soo saarka, iyo dib-u-habeynta guud ahaan waxay udhaxeeyaan 10 MHz iyo 100 ghz. Jaantuska hoose wuxuu muujinayaa kala-beddel caadi ah (AnD) dissicon femtosecondAaladda Fiber Laser, kuwa badankood waxaa lagu dhisi karaa iyadoo la adeegsanayo qoryaha heerarka caadiga ah (fiber, muraayadda, buurta iyo miiska barokaca).

Farsamada faaruqalinta Daloolka ayaa loo isticmaali karaaLoo yaqaan 'lasers'Si loo helo puls-ka gaagaaban iyo kuwa-qufulka-qufulka ah si loo kordhiyo tamarta garaaca garaaca wadnaha iyada oo la raacayo dib-u-habeynta hoose.

Waqtiga Domainka iyo Buugga soo noqnoqda
Qaabka toosan ee garaaca wadnaha oo waqtigu guud ahaan waa mid fudud oo waxaa lagu sheegi karaa Gauss-ka iyo howlaha Sech². Wakhtiga garaaca wadnaha (oo sidoo kale loo yaqaan Pulse ballac ahaan) waxaa badanaa lagu muujiyaa qiimaha badh-dhudhunka (FWWM), taasi waa, ballaca guud ee awoodda indhaha ee ugu yaraan kala badh awoodda ugu sarreeya; Laser-wareejiyay laser wuxuu abuuraa nanosecond-ka gaagaaban
Lasers-qumbaha-quful-quful-qufulku waxay soo saaraan puls-ga gaagaaban (USP) si ay u kala horreeyaan tobanka tobanka picoseconds ilaa femtosoleconds. Elektaroonigga xawaaraha sare ayaa kaliya u cabbiri kara ilaa tobanaannada picosueconds, oo gaagaaban ayaa lagu qiyaasi karaa oo keliya tikniyoolajiyadda indhaha ee saafiga ah sida autocrobrobators, frog iyo caaro. In kasta oo nanosecond ama pulses-ka dheer ay si adag u beddelaan ballaca wadnaha ee wadnaha markay safraan, xitaa masaafado dhaadheer, miraha gaagaaban ee ultra-gaaban waxaa saameyn ku yeelan kara arrimo kala duwan:

Kala-beddelku wuxuu sababi karaa ballaarinta garaaca wadnaha, laakiin waxaa lagu soo noolayn karaa kala firidhsan ka soo horjeedda. Jaantusyada soo socota ayaa muujineysa sida Thorlabs Femtosecond Pultosecond Compessecond Compessecond Compesen Compresport loogu talagalay kala firidhsan microscope.

Guud ahaan guud ahaan si toos ah uma saameynayso baaxadda garaaca wadnaha, laakiin way ballaarineysaa xarkaha, taasoo ka dhigeysa garaaca wadnaha inay u nugul yihiin kala-duwanaanshaha inta lagu jiro faafinta. Nooc kasta oo fiber ah, oo ay ku jiraan warbaahin kale oo leh warbaahin oo leh xayndaab xadidan, waxay saameyn ku yeelan kartaa qaabka xarkaha ama garaaca wadnaha ee gaagaaban, iyo hoos udhaca xarkaha loo yaqaan 'bandwidth' waxay u horseedi kartaa sii ballaarinta waqtiga; Waxa kale oo jira kiisas meesha ballaca garaaca wadnaha garaaca wadnaha si xoog leh uu u gaabiyo marka muuqaalka muuqaalka uu sii yaraado.